Cisco Switching/Routing :: Switch 3750 High Cpu In Arp Process?
Jun 4, 2012
Our switch is very high cpu in process arp
Am debug ip arp track command the result as below
-- on this switch have interface vlan 201 ip subnet is 10.11.201.1/24
Jun 5 15:30:40.732 GMT+7: IP ARP: rcvd req src 10.11.201.217 0001.6c6b.8ab9, dst 172.27.116.73 Vlan201
Jun 5 15:30:42.150 GMT+7: IP ARP: rcvd rep src 10.11.201.217 0001.6c6b.8ab9, dst 172.27.116.4 Vlan201
Jun 5 15:30:42.150 GMT+7: IPARP_TRACK: ARP tableid(0) 10.11.201.217 Vlan201 mode(1) modified.
Jun 5 15:30:42.150 GMT+7: IP ARP: rcvd req src 10.11.201.217 0001.6c6b.8ab9, dst 172.27.116
and then am try to shutdown vlan database 201 after that the cpu process has to normal state.
How to check the root cacus?
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Nov 18, 2012
I'm facing high CPU utilization issue due to a ssh process on 3750 switch. What is the use of SSH proces in the switch? Can I disable it for troubleshooting?
will there be any impact if I disable it?
#sh processes cpu sorted 5min
CPU utilization for five seconds: 99%/0%; one minute: 66%; five minutes: 46%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
159 1896078 589986 3213 3.96% 10.76% 14.00% 0 Hulc LED Process
165 32871 591 55619 77.42% 33.40% 8.85% 3 SSH Process
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Oct 19, 2012
In Cisco 3750 facing high CPU utilization for specific period. During this period traffic response times across the switch degrades. Steps to identify interface potentially generating traffic. I have attached 'sh proc cpu history' , ' sh ip traffic', 'sh proc cpu sorted' during troubled period .
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Dec 26, 2012
We are having 3750 Stack switch as our edge switch. Here we are having some issues as low memory & itermediate High CPU utilization.For memory when we checked its shwoing maximum memory is allocated to DHCPD receive & ARP Input as follows
Processor Pool Total: 70829380 Used: 56809532 Free: 14019848
I/O Pool Total: 12582912 Used: 8554920 Free: 4027992
Driver te Pool Total: 1048576 Used: 40 Free: 1048536
[code].....
i want to understand why this 2 proceses (DHCPD & ARP input) taking more memory?High CPU: We also facing intermediate high CPU utilization (above 95%). When CPU is high there were 2 processes consuming more CPU are 'Spanning Tree' (about 20%) & ARP Input (about 66%). we also checked the ARP entries, there were 1500 ARP entries & 2 incomplete ARP (out of 6000 ARP supported)
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Jan 30, 2012
WS-C3750G-24TS-S1U switch stack with high CPU utilization. 3 switches are stacked and using PBR on that. I am attaching the show cpu process as an attachment.The current template is "desktop routing" template.The selected template optimizes the resources in the switch to support this level of features for 8 routed interfaces and 1024 VLANs. [code]
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May 29, 2012
I have a process whick take all the CPU on two differents Stack of WS-C3750G in version 12.2.53(SE2):
XFRPALSN02R#sh proc cpu sorted CPU utilization for five seconds: 97%/3%; one minute: 95%; five minutes: 95% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 307 5450059 4167397 1307 86.74% 83.63% 83.35% 0 hulc nrgyz PD di XFRPALSN02R#sh proc cpu sorted CPU utilization for five seconds: 96%/3%; one minute: 96%; five minutes: 96% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 307 7779608 5947379 1308 86.26% 85.75% 85.30% 0 hulc nrgyz PD di
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Oct 9, 2011
i try newest ios 15.1(3)S0a and 12.2(33)SRE
in both case some times i obtain lowing traffic on interface and highest cpu - to 100%
after clear cef linicard i obtain growing traffic and cpu 0%
#sh proc cpu s
CPU utilization for five seconds: 87%/83%; one minute: 91%; five minutes: 96%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
7 1711512 87883 19474 4.06% 0.84% 0.89% 0 Check heaps
[Code].....
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Nov 29, 2011
I have a router 3845 with c3845-advsecurityk9-mz.124-24.T6.bin software . Frequently we are facing problem in logging to the device .Inorder to resolve we need to reboot the router . Yesterday fortunately i have got the console access for some time so i came to know that TPLUS process is consuming 99.9% percentage cpu.
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Aug 30, 2010
I have a problem with cpu high.tell me if normal have this process?
CPU utilization for five seconds: 29%/0%; one minute: 29%; five minutes: 30%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
29 198216576 402619350 492 15.83% 15.87% 15.68% 0 Cat4k Mgmt HiPri
30 175197296 96703435 1811 10.23% 10.10% 10.64% 0 Cat4k Mgmt LoPri
Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version 12.2(25)EWA14, RELEASE SOFTWARE (fc1)Technical Support: [URL] Copyright (c) 1986-2008 by Cisco Systems, Inc.Compiled Tue 20-May-08 18:49 by chendahImage text-base: 0x10000000, data-base: 0x114BE208
ROM: 12.2(31r)SG2Dagobah Revision 226, Swamp Revision 34
System returned to ROM by reloadSystem restarted at 00:36:52 UTC Sat Dec 10 2011System image file is "bootflash:cat4000-i9s-mz.122-25.EWA14.bin" cisco WS-C4506 (MPC8245) processor (revision 10) with 262144K bytes of memory.MPC8245 CPU at 266Mhz, Supervisor II+Last reset from Reload1 Virtual Ethernet interface144 FastEthernet interfaces2 Gigabit Ethernet interfaces511K bytes of non-volatile configuration memory.Configuration register is 0x2102
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Feb 6, 2012
We are experiencing with high CPU input due to ARP input between 20:30 and 22:30 every day At this time we have a lot of backup operations. When I look the netflow report, I can't see anything anormal.
We are changing our backup server's NIC card from 1gig to 10Gig. The backup operation's traffic is high (approx 2Gbps level) but 6509 has to be handle this size of traffic.
We are using two 6509E in VSS mode and our image version is s72033-adventerprisek9_wan-mz.122-33.SXJ.bin
20:00
show ip arp summary
--------------
2588 IP ARP entries, with 166 of them incomplete
[Code].....
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Nov 13, 2011
which process is consuming high memory with my c6509 switch.
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Apr 18, 2012
we are using Cisco 6509-E VSS mode [12.2(33)SXI] ipbase image and facing high cpu utilization. In show process cpu output it is showing some "ios-base" process consuming cpu. I attached show cpu output
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Apr 3, 2012
We are running a stack of 2 WS-C3750X-24S-E's with IOS version 12.2(58)SE2 and we are seeing continuous high processor utilization involving the hl3mm process. The stack is configured for PIM Sparse mode, with 2 upstream Nexus 5596'es acting as both RP candidates and as BSRs. The hl3mm process generally runs at about 19% but can spike up into the 60% range.Symptoms on the 3750X are spiking latency and sluggish CLI perfformance. I thought at first that we might be running into SDM limits, but the "show platform tcam utilization" show that we are far under the limits of the default SDM template. Performing the "show ip pim (vrf name) bsr-router" command freezes the system and takes 20-30 seconds to return results. Similiarly configured WS-C3750G-12S running 12.2(55)SE3 does not exhibit these same issues.
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Sep 23, 2012
I have a hub and spoke WAN that conisits of one core location with with a 6500 and nine other buildings using 4006 Catalyst that conenct back to the core via dual gig fiber. We are using EIGRP at each location as well as the core. I was tesing something at one of our buildings decided to hang a 3750 off the 4006 and enable the same eigrp process on the 3750 that is enabled on the 4006 and 6500 (EIGRP 1).
1. All the routes that the 6500 knows about are advertised out to each of the nine locations.
2. The 4006's are all advertising thier directly conencted routes to the 6500.
Onto the location I was testing at:
The 4006 where I was testing at has four vlan interfaces enabled and they are in an UP/UP state. The ip routes from the 4006's directly conencted vlan interfaces propogate to the 6500 at our core location and the 6500 sucsefully propgates these learned routes to all the other 4006's.
This past Friday I configured a 3750x with two /22 vlan interfces and one physical gi port with an IP address and also configured on Ethernet port on the 4006 with an IP address in the same network block as the 3750x gi interface (a /30 netowrk block). I saw both interfaces come up and EIGRP sucesfully established a neighbor adjecency between the 3750x and the 4006.
I noticed that the 3750 advertised out all of it's directly conencted routes to the 4006 and the 4006 advertised it's directly conencted routes to the 3750. However, the 4006 did not advertise any of the routes it had learned from the 3750x to the 6500 and nor did the 4006 advertise any of the routes it had learned from the 6500 to the 4006. My suspicion is that the "eigrp stub connected summary" statement is enabled on both the 4006 and 3750 thus prevenintg them form advertising out any routes other than thier directly conencted routes. Can any of you verify that I'm either correct or inccorect about this?
here are the eigrp statemnets from the 6500 and 4006:
6500:
router eigrp 1
redistribute static
network 10.0.0.0
network 172.16.0.0
network 172.17.0.0(code)
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Mar 28, 2012
I have a Catalyst Switch 6000. Inoticed that after the execution of the job inventory in LMS, and after the snmp queries reached the equipement, the cpu value reached 98-99 % due to the process : PDU DISPATCHER (what’s it ?)
I have also a script running in the switch to observe the differents logs. For exemple, when high cpu is obtained, the message bellow appear :
« %SNMP-3-INPUT_QFULL_ERR: Packet dropped due to input
« %SNMP-3-INPUT_QFULL_ERR: Packet dropped due to input
« %SNMP-3-INPUT_QFULL_ERR: Packet dropped due to input
....
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Oct 24, 2012
The switch 6500-E is frequently crashing whenever the pm scp process reach 100% .I got it under the command "remote command switch show proce cpu".How to solve the problem. I opened the TAC and the engineer says to upgrade the image12.2(18) sxf.Is there any other work around that would avoid to reimage the switch and reloading.
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Jun 7, 2012
I have a problem with a 9 3750 switch stack. If you take a look at the show proc cpu history command , the following is seen:
1291999691191111911110111991117911119111191111911119111931
8994899595719876945570744993236132549385494445924169433963
100 * *** * * * ** * * * * *
90 * *** * * * * ** * * * * * *
[Code].....
Is it maybe a normal background proccess that runs in all the switches but , for some kind of reason, is not working properly?
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May 17, 2011
I have in my router 2801, one link with 20 MB WAN Connection, and it is presenting high cpu utilization with 97% Interrupt Errors when start one download.
I exchanged it to another router the 2811 and it presented the same results. I read the cisco document about Router Performance.
And it speaks about the 2801 supports 46 Mbps using CEF/Fast Switching and 1.5Mbps using only Process Switching, and 2811 supports 61.44 CEF and 1.5Mbps Process Switching.
I need to know if the NAT Process is process switching or CEF Switching. Because if it was process switching the router is working in the max capacity and i will need to exchange the hardware to a better hardware.
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Oct 9, 2012
I have two core switches - 4506E, and i noticed there are frequent cpu spikes on both of the cores switches. As its spikes intermitendly i couldnt able to anlyze the issue. I need inputs on the following,
1) Is there any Free CPU process monitoring tools to identify which process is spiking ?
2) Troubleshooting techniques to identify the issue.
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Feb 4, 2013
my 3750-E Core Stack is connected to the Provider Router and is the DG for the internal LAN. I saw that the CPU is very high also in the night, but I found not the problem. I use an SVI to connect the provider due to HA reasons. I sniffered the network but saw no ecessive broadcaststorms. There was a PBR configured but I deleted it wihtout any success..
switch Version
15.0(1)SE1
10#sh proc cpu so
[Code]......
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Apr 24, 2013
I've been looking at reported problems with our Vdeio Conferencing kit attched to a stack of 3750's (which I think is down to QoS) but this got me looking at the logs. We get a lot of high CPU utilization warnings mainly for SNMP (315), Hulc running con (95), Virtual exec (289). I understand the last two are normal, and the SNMP one is probably Cisco Works polling as it happens every 4 hours.
However I've got an odd one: Apr 25 07:34:58: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 93%/0%, Top 3 processes(Pid/Util): 296/85%, 144/0%, 154/0%
What is Pid 296? It's not listed on the switch:
293 39056 18456 2116 0.00% 0.00% 0.00% 0 SpanTree Helper
294 8 73 109 0.00% 0.00% 0.00% 0 EEM Server
295 0 2 0 0.00% 0.00% 0.00% 0 EEM Policy Direc
[Code].....
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May 3, 2012
I have some events where the CPU utilization in a cluster switches of WS-3750 is going to 100%, the process with the major utilization of CPU is the "hulc running con".
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Sep 6, 2012
I have a Switch WS-C3750E-48PD-SF with IOS 12.2(58)SE2 which reports more than 80% in utilization of memory I don't know what is causing the high memory utilization.
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Oct 1, 2011
We added Site02 for redundancy and DR. Also added new SAN and ESX hosts. The CPU on device Site01Server01 is not very happy when files are being transferred between the sites. Since the setup is the same at both sites, why is the problem only at site01?
Site02 is newer and we have two 3750X-24 with IOS 12.2(55)SE3 on ipservices, for site02server01; no problem.
Site01server01 is a stack of two 3750G-24PS with IOS 12.2(58)SE on ipservices.
[Code]....
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Jan 21, 2012
I have a new cisco 3750 stack comprised of 8 members (6 x 3750G-48PS and 2 x 3750V2-48PS) running 'c3750-ipservicesk9-mz.122-58.SE2.bin'. I am seeing high memory utilisation, it seems to sit fairly stable and I do not see an increase but this has only been running a few days. No errors or performance issues. Should this be a cause for concern?
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Sep 12, 2012
We have a 3750 stack with a mix of 3750G and 3750X switches. The current active template on the switch is desktop default and we are running EIGRP on the switch with large routing table so we get the TCAM error that a specific prefix cannot be programmed in TCAM memory so it will be software forwarded.%PLATFORM_UCAST-4-PREFIX: One or more, more specific prefixes could not be programmed into TCAM and are being covered by a less specific prefix, and the packets may be software forwarded
This error is quite frequent on a daily basis. My question is that will this error create a high CPU situation and affect traffic processing on the stack causing ESX Hosts to become unresponsive?
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Nov 2, 2011
i have an issue to connect a trunk between cisco switch and extreme switch i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch
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Nov 18, 2012
I have two 3750-X configured to be a stack and I am planning to re-rack these somewhere else. What I would like to know is what are the effects of having the master switch itself lose power? Does it immediately just make the member take over master (there should be no election since there are only 2 switches??) and there would be no loss of connectivity?
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Feb 16, 2012
I am a new network engineer on a retail company and I am having a problem on the High utilization of my 3-stack switch 2960 only during Peak Hours of the Store Sales.
Note: on Peak hours, it is peaking at 90-95 %
here is the utilization after Peak hours:
4444333334444433333333333333333333333333333333333333333333
[Code]......
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Sep 5, 2012
I have been facing High CPU Utilization issue with few of my Cisco 4006 Switches together from last one month. Out of which 1 switch issue sorted out auto after 2 days however the problem is still exists with rest 3 switches.They are 6-7 year old and having one SUP engine and other are switch port modules.
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Apr 9, 2013
The process "HL3U bkgrd proce" is causing high CPU usage issues in a switch 3750X-24T-L. The IOS is 15.0.2-SE2.
show platform ip unicast failed route and adjacencies displays a lot of entries, I've seen up to 1200.
After restart HL3U bkgrd proce takes around 10 - 20 % CPU, some hours later 99%.
A coupe of times we got logs like this:
%SYS-3-CPUHOG: Task is running for (2136)msecs, more than (2000)msecs (172/73),process = HL3U bkgrd process.
-Traceback= 0x1BE9C3Cz 0x27E103Cz 0x27E0F64z 0x50DCF8z 0x50DE98z 0x503BD0z 0x4F7718z 0x1FF0A18z 0x1F46DECz 0x1F4816Cz 0x1F48698z 0x1F499C8z 0x1FF15D0z 0x2000430z 0x1FF55B4z 0x1FF5FA4z
[Code].....
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Aug 19, 2012
We are facing issue of high Latency and slowness with Switch Cisco 4507R at the Customer site.show logging for the Switch and if there is any IOS related issue [BUG] or some other finding for this case.
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Dec 20, 2011
I am experiencing high cpu utilization in my 4000 series core switch.
I checked the loggs. i saw some strange loggs.
Please see the below logs:
Code...
What is the "invalidsourceaddresspacket" ?
Is this is due to some virus attack or something?? Also one more thing this switch is the Active router in HSRP.
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